The Weather Outlook

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DEW
  • DEW
  • Advanced Member
Sunday, February 23, 2025 9:06:38 AM
WX temp charts much like yesterday, with cold weather withdrawing from the E Mediterranean (and by week 2 becoming very warm there) while bulking up over Russia and to some extent over Scandinavia - Scotland getting a touch of this while most of W Europe is quite close to norm for the next two weeks. Rain for far W coasts of Europe and the Adriatic in week 1, more generally for W Europe exc Spain in week 2.

GFS op 00z: LPs tracking from W of Ireland to N of Scotland through to Sat 8th with winds from SW/W, often strong, and with ridges and troughs following each other in quick succession (LPs' deepest and/or closest approaches today 960mb S of Iceland, again Sat 1st, and Wed 5th Faeroes). A pattern change on Sat 8th as LP drops S-wards down the N Sea 980mb S Norway with brief shot of N-lies for Britain, then HP from the SW 1040mb Ireland Tue 11th restoring milder weather while the cold shot goes on to create stormy weather in the Adriatic.

ECM: similar to GFS but LPs often further north and HP trying to nose in to S England, so more settled there and to some extent for UK as a whole; the approach of HP in the S on Sat1st and Wed 5th generates strong gales for NW Britain

GEM: more like ECM with an even more marked rise of pressure for the S before and after Sat 1st 1030mb  with ridge extending to Norway before normal Atlantic service resumes on Tue 4th

GEFS: a couple of wet days in the south in the near future, amounts scarcely noticeable in Scotland esp the E; dry-ish to Sat 1st after which rain in most ens members at some point in small amounts except the NW where often heavy. Mean temp dropping to norm or in the S a little below to Sat 1st, well supported by ens members which then start to diverge. Chance of something milder in the S in the following week, near norm more likely in N.


War is God's way of teaching Americans geography - Ambrose Bierce

Chichester 12m asl

tallyho_83
Sunday, February 23, 2025 5:31:33 PM
Seeing as the models are showing persistent zonality and NO change, I thought it was time to look what's going on in the stratosphere @ 10hpa

UserPostedImage


Home Location - Vixen Tor Close, Okehampton, Devon (221m ASL)

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Sean Moon

Magical Moon

www.magical-moon.com

doctormog
Sunday, February 23, 2025 5:34:23 PM

Seeing as the models are showing persistent zonality and NO change, I thought it was time to look what's going on in the stratosphere @ 10hpa

UserPostedImage

Originally Posted by: tallyho_83 

So, not much in the next two weeks ? Then maybe a slight warming (which has been shown a few times but not amounted to much)? Even if did materialise as a “proper” warming in March and had an effect it would probably not be one that most people wanted.


tallyho_83
Sunday, February 23, 2025 5:37:49 PM

So, not much in the next two weeks ? Then maybe a slight warming (which has been shown a few times but not amounted to much)? Even if did materialise as a “proper” warming in March and had an effect it would probably not be one that most people wanted.

Originally Posted by: doctormog 

And that would be a cold wintry start to April as per last year, year before last and April 2022 etc! Typical. That's if it does occur.


Home Location - Vixen Tor Close, Okehampton, Devon (221m ASL)

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Sean Moon

Magical Moon

www.magical-moon.com

tierradelfuego
Sunday, February 23, 2025 7:11:01 PM
Can't remember who said March looked to be coming in like a Lion, and obviously that must have been how the charts looked then, but for down here at least now, it's looking like a lamb is the form.

On both the OP and GEFS the summary would be dryish, high pressure and at least average 850s, albeit the OP was well at the top of the pack on the latter. Sunshine... I'll hazard a guess based on the last few months but happy to be surprised...


Bucklebury

West Berkshire Downs AONB

135m ASL

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Rainfall collector separated at ground level

Anemometer separated above roof level

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DEW
  • DEW
  • Advanced Member
Monday, February 24, 2025 8:28:12 AM
WX: warmer air moving up from the south into Turkey by week 2 and colder weather retreating before it into Russia. Not much change for W Europe which stays  around norm. Rain for Atlantic coasts week 1, more general for W Europe week 2, but not much for Britain exc far NW

GFS Op 00z: current LP moves to NE Iceland by tomorrow ushering in a long period of W-lies, no doubt with occasional fronts moving across from the Atlantic. GFS follows ECM's lead from yesterday in raising pressure over England. HP is established there 1025mb Fri 28th and comes and goes mostly centred near Brittany. End of run shows a small LP 990 mb N Scotland Tue 11th but until then that area has quite high pressure, around 1010mb

ECM: similar to GFS but Hp may slide E-wards by Thu 6th

GEFS: temps near norm to Sat 1st then in S mild for a week  before returning to norm (but op and control the go opposite ways, up and down respectively. ) In the N nearer norm and more disagreement between ens members. Rain in the S on 27th, otherwise splashes now and then through to 12th exc always heavier in W esp NW.


War is God's way of teaching Americans geography - Ambrose Bierce

Chichester 12m asl

Ally Pally Snowman
Monday, February 24, 2025 11:27:37 AM

Can't remember who said March looked to be coming in like a Lion, and obviously that must have been how the charts looked then, but for down here at least now, it's looking like a lamb is the form.

On both the OP and GEFS the summary would be dryish, high pressure and at least average 850s, albeit the OP was well at the top of the pack on the latter. Sunshine... I'll hazard a guess based on the last few months but happy to be surprised...

Originally Posted by: tierradelfuego 

Yep the zonal outlook has changed and it's looking OK at least for the southern half of the UK. Maybe a bit of Spring warmth as well.


Bishop's Stortford 85m ASL.
DEW
  • DEW
  • Advanced Member
Tuesday, February 25, 2025 8:35:45 AM
WX temp charts show little change with freezing weather retreating from the Black Sea N-wards into Russia and N Scandinavia, tough perhaps more slowly than shown yesterday, and less tendency for Scotland to be affected on the fringe of this. W Europe near norm, and milder weather spreading to C Europe too. Generally damp across Europe in week 1, some heavy rain in Adriatic; a very dry area developing for England (not N Scotland) and N France in week 2, fairly dry for the rest of Europe.

GFS Op 00z: the main LP stays E of Iceland with a W-ly theme to the weather; after a significant trough crossing Britain tomorrow (Wed) HP is the dominant influence for Britain and W Europe for the next two weeks, typically 1030mb around the English Channel. A couple of approaches by LP from the Atlantic Sat 8th and Thu 13th freshen up the wind from the S but make no progress against the block.

ECM: like GFS but with stronger W-lies for N Britain and at the weekend the Atlantic trough arrives a day earlier (Fri 7th) deeper (970mb) and closer (just off W Scotland)

GEFS: In the S cool to Sun 2nd with a day of heavy rain on Wed, then mild or very mild to Sun 9th with good ens agreement, then the usual scatter and the mean retreating to norm though op stays mild. Dry after Wed until rain in some runs from Sun 9th. In the N near norm and dry at first but rain starting Wed 5th in the west and quite heavy at times; the mild weather is less marked, less prolonged and less consistent. 


War is God's way of teaching Americans geography - Ambrose Bierce

Chichester 12m asl

Saint Snow
Tuesday, February 25, 2025 9:49:20 AM

Thanks Blake! Glad you appreciated my take on things.

Anyway the GFS0Z is a big suprise, that came out of nowhere.

UserPostedImage

Compared to the 18Z we have a big upper level ridge that has appeared and seems to have germinated a scandi high.

Originally Posted by: Quantum 

It's been interesting to see how that chart has changed each time I've entered the thread! It looks nothing like when you originally posted it.

(PS - thanks also for your analysis, Q)


Martin

Home: St Helens (26m asl) Work: Manchester (75m asl)

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The Beast from the East
Tuesday, February 25, 2025 12:13:42 PM
Depends on cloud amounts, but if we can get some sun, it should feel like Spring.  However, given our recent experiences with dirty highs, it could easily be grey muck and depression
Purley, Surrey, 70m ASL

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Brian Gaze
Tuesday, February 25, 2025 4:44:02 PM
ECM precipitation type charts will shortly be available freely on TWO. Here's a test plot from today's 00Z update.

Edit: the full range is Rain, Freezing rain, Snow, Wet snow, Mixture of rain and snow, Ice pellets, Freezing drizzle 

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Brian Gaze

Berkhamsted

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DEW
  • DEW
  • Advanced Member
Wednesday, February 26, 2025 8:31:17 AM
WX temp charts show cold weather continuing to shrink back NE-wards; most of W Europe near norm (a little above in Germany, a little below in Spain) and getting milder in week 2. E Turkey still very cold but warming slowly. Rain in week 1 in the Adriatic and N Atlantic coasts; otherwise generally damp. In week 2 very dry over France and Italy and far S of England, damp elsewhere.

GFS Op 00z: starting with a gentle W-ly and trough crossing Britain today, Hp building in from the W and lasting to Thu 6th typically 1025mb English Channel. Then (as predicted by ECM yesterday but missed by GFS) Lp moving in from Atlantic in two stages, eventually 995mb Dorset Sun 9th (conflict with WX above?) Ridge of HP then appears SW=NE across Britain from Atlantic to Norway while the LP moves on to Corsica, slowly drifting bodily SE-wards with Atlantic threatening to resume Fri 14th.

ECM: like GFS - Hp positioned a little further S for this week, LP confirmed for the weekend Sat 8th 1000mb Cornwall

GEFS: In the S, rain today, cool to Mon 2nd, mild or very mild and dry to Fri 7th with good ens agreement, after which a variety of ens outcomes, mean near norm but +/-6C available and some runs with a little rain (far SW, heavy 7th-9th). In the N similar though no sgnificant rain today - ens members much less well agreed on temps and small amounts if rain from as early as 5th in some runs, always more likely in NW.


War is God's way of teaching Americans geography - Ambrose Bierce

Chichester 12m asl

Retron
Wednesday, February 26, 2025 8:34:49 AM

ECM precipitation type charts will shortly be available freely on TWO. Here's a test plot from today's 00Z update.

Edit: the full range is Rain, Freezing rain, Snow, Wet snow, Mixture of rain and snow, Ice pellets, Freezing drizzle 

Originally Posted by: Brian Gaze 

Now that's interesting - it'd be fascinating to see those broken down on charts in the future. Maybe white for "snow", the current purple for "wet snow", orange for "ice pellets"? Not sure about the "rain and snow" or "freezing rain/drizzle", though, but it'd be useful to see those broken out too.

That would make the product a definite step above anything I've seen elsewhere. The distinction between snow and wet snow would be especially useful, as the former would be more likely to settle as opposed to our usual slushy wet stuff.


Leysdown, north Kent
idj20
Wednesday, February 26, 2025 11:16:22 AM
Again, it's always the GFS 06z that seem to like showing (or put out) the least appealing output at the FI range. I know it should never be taken as an actual forecast, it's just something I've noticed. 
Home location: Folkestone Harbour.
Brian Gaze
Wednesday, February 26, 2025 11:49:23 AM

Now that's interesting - it'd be fascinating to see those broken down on charts in the future. Maybe white for "snow", the current purple for "wet snow", orange for "ice pellets"? Not sure about the "rain and snow" or "freezing rain/drizzle", though, but it'd be useful to see those broken out too.

That would make the product a definite step above anything I've seen elsewhere. The distinction between snow and wet snow would be especially useful, as the former would be more likely to settle as opposed to our usual slushy wet stuff.

Originally Posted by: Retron 

One thing I've noticed is that some ECM plots available on third party websites appear to show too much snow, probably because they're not factoring in what I've mentioned. (I won't name them.)


Brian Gaze

Berkhamsted

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Brian Gaze
Wednesday, February 26, 2025 1:39:15 PM
I've modified the UK ECM precip charts to show rain, sleet, wet snow and snow. The chart below is a static snapshot which illustrates all four types.

Select UK - Precip from the page linked below to view (no login needed)

https://www.theweatheroutlook.com/twodata/ecmhr.aspx 

UserPostedImage


Brian Gaze

Berkhamsted

TWO Buzz - get the latest news and views 

"I'm not socialist, I know that. I don't believe in sharing my money." - Gary Numan

Retron
Wednesday, February 26, 2025 1:54:36 PM

I've modified the UK ECM precip charts to show rain, sleet, wet snow and snow. The chart below is a static snapshot which illustrates all four types.

Originally Posted by: Brian Gaze 

That's super - as far as I know, that's unique on the Web, too. Thank you! 👏


Leysdown, north Kent
Brian Gaze
Wednesday, February 26, 2025 4:14:51 PM

That's super - as far as I know, that's unique on the Web, too. Thank you! 👏

Originally Posted by: Retron 

I've just updated the North Atlantic ppt charts using the same formatting. It's quite interesting to look at the ppt types around Iceland.

https://www.theweatheroutlook.com/twodata/ecmhr.aspx?run=00&charthour=3&chartname=eur_precipitation_rate&chartregion=eur&charttag=Precip%20type 


Brian Gaze

Berkhamsted

TWO Buzz - get the latest news and views 

"I'm not socialist, I know that. I don't believe in sharing my money." - Gary Numan

picturesareme
Wednesday, February 26, 2025 4:36:48 PM
After today it's looking like a week or so fine early spring weather 🌞 down here. Not much rain in the forecast.
Hippydave
Wednesday, February 26, 2025 5:16:05 PM

I've just updated the North Atlantic ppt charts using the same formatting. It's quite interesting to look at the ppt types around Iceland.

https://www.theweatheroutlook.com/twodata/ecmhr.aspx?run=00&charthour=3&chartname=eur_precipitation_rate&chartregion=eur&charttag=Precip%20type 

Originally Posted by: Brian Gaze 

I'll echo others comments - that's a really nice facility/chart to be able to access, thank you 😁

Now all we need IMBY is some wintry weather to test them, which seems rather unlikely for the foreseeable future.  

Output wise I must admit I've moved more towards my usual spring/summer hibernation mode as nothing overly exciting was on offer and I think that remains the case IMBY. As Picturesareme mentions we are looking likely to have a nice dry and increasingly mild/sort of warm spell over the next 7-10 days before it looks like potentially turning more unsettled again. It does look like the mild/dry stuff will  extend to a large chunk of Scotland too even if not quite as strongly as down south. 


Home: Tunbridge Wells

Work: Tonbridge

doctormog
Wednesday, February 26, 2025 5:19:42 PM

After today it's looking like a week or so fine early spring weather 🌞 down here. Not much rain in the forecast.

Originally Posted by: picturesareme 

Similar here with little rain in the forecast over the next 10 days or so, which suits me just fine!

https://www.wetterzentrale.de/maps/GFSOPUK12_240_49.png 


DEW
  • DEW
  • Advanced Member
Thursday, February 27, 2025 7:34:18 AM
WX temp charts still show little change from the last two days with freezing weather retreating from the Black Sea N-wards into Russia and N Scandinavia, still quite a slow process, and less tendency for Scotland to be affected on the fringe of this. W Europe near norm, and milder weather spreading to C Europe too. Dry for Britain and France week 1 and fairly dry for most of Europe, some rain on N Atlantic. The dry area moves in week 2,  positioned E England to Baltic, rain for W Britain and the Pyrenees.

GFS Op - LP slowly moving away today, HP moving in from the SW typically 1030mb England to Thu 6th when it moves a little E-wards and an Atlantic trough approaches. That splits with the S portion running down to the Pyrenees and the HP, recharged from the SW, is back Mon 10th until Fri 14th when deep LP near Iceland starts to take over.

ECM - similar though split of LP 6th puts the larger northern portion near NW Scotland.

GEFS - In the S, cool now, becoming very mild around Thu 6th with good ens agreement, mean then near or a little above norm but with a few V cold outliers. Some rain in some runs around Sun 9th and Sat 15th. Similar in N, fair agreement of ens members but leaves out cold outliers. Always more rain in NW incl extra period on Wed 5th.


War is God's way of teaching Americans geography - Ambrose Bierce

Chichester 12m asl

MRazzell
Thursday, February 27, 2025 8:19:43 AM
Southern slant on this post, but looks like ECM and GFS are in cahoots for the next 7 days with some mercifully dry and, on the face of it, sunny weather to come in the reliable output. Could be quite mild by this time next week if the control verifies. GFS ensembles still a little loose with the 850's period 3rd-5th but generally in agreement with direction of travel. No real outliers within the reliable timeframe.

Could change in the next 90mins but looking to be a decent spring-like spell coming up. Hopefully rain doesnt spoil the show like it did with last weeks mild spell.


Far north of East Sussex. +150m asl.
Jiries
Thursday, February 27, 2025 10:37:42 AM

Southern slant on this post, but looks like ECM and GFS are in cahoots for the next 7 days with some mercifully dry and, on the face of it, sunny weather to come in the reliable output. Could be quite mild by this time next week if the control verifies. GFS ensembles still a little loose with the 850's period 3rd-5th but generally in agreement with direction of travel. No real outliers within the reliable timeframe.

Could change in the next 90mins but looking to be a decent spring-like spell coming up. Hopefully rain doesnt spoil the show like it did with last weeks mild spell.

Originally Posted by: MRazzell 

Like today and Tom sunny weather is very welcome and glad no less cold wet easterly anymore.  The more sunny days this coming Spring the better is and this morning for the first time properly warming up indoors as conservatory are back in business to warm up free with heating costs rapidly cut down a lot since the easterly spell.  As long no SSW occur then we safely get though this time. 

Retron
Thursday, February 27, 2025 10:39:30 AM

  As long no SSW occur then we safely get though this time. 

Originally Posted by: Jiries 

Hah, we're at the time of year when the final warming hoves into view. The ECM has it as being late March this year:

https://charts.ecmwf.int/products/extended-zonal-mean-zonal-wind?area=nh&base_time=202502260000 


Leysdown, north Kent

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